Java send Stack trace to different output stream

Question

I need to log a stack trace when I catch an exception in my Java app. I know that exceptions have a built in printStackTrace() method, and that that can send the stack trace to a different PrintWriter/PrintStream, but it would be useful if I could grab the stack trace as a String so that I can manipulate it or display it in a JMessagePane or something. Currently, the only way I have to do this is:

String stackTrace = "";
stackTrace += e.getClass().getName() + ": " + e.getMessage() + "\n";

for (StackTraceElement elt : e.getStackTrace()) {
    stackTrace += "\tat " + elt + "\n";
}

Is there a cleaner way to do this?

It's probably worth noting that the printStackTrace method does much more than the alternative suggested in the question body. That is, it includes the stacktrace for the cause if one is set and excludes any StackTraceElement from the cause that is common to the original exception, hence the phrase ... <int> more — Tim Bender
– Tim Bender, Commented Feb 22, 2012 at 22:49
excellent point. That is another reason that I want more elegant way to do it. — ewok
– ewok, Commented Feb 23, 2012 at 13:44

Tomasz Nurkiewicz · Accepted Answer · 2012-02-22 22:31:23Z

24

There is:

StringWriter writer = new StringWriter();
e.printStackTrace(new PrintWriter(writer));
String stackTrace = writer.toString();

answered Feb 22, 2012 at 22:31

Tomasz Nurkiewicz

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Comments

Sébastien Helbert · Accepted Answer · 2012-02-22 23:05:44Z

4

using commons-lang :

String stackTrace = ExceptionUtils.getStacktrace(e);

javadoc : ExceptionUtils.html#getStackTrace().

edited Feb 22, 2012 at 23:05

answered Feb 22, 2012 at 22:38

Sébastien Helbert

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